Louisa County, Iowa · Frost dates
Louisa County frost dates.
First-frost, last-frost, and growing-season length for Louisa County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-11
- 20%
- 05-05
- 50%
- 04-26
- 80%
- 04-16
- 90%
- 04-11
First fall frost
- 10%
- 09-23
- 20%
- 09-29
- 50%
- 10-10
- 80%
- 10-19
- 90%
- 10-22
28°F — killing freeze
Last spring freeze
- 10%
- 04-30
- 20%
- 04-25
- 50%
- 04-15
- 80%
- 04-06
- 90%
- 04-02
First fall freeze
- 10%
- 10-02
- 20%
- 10-09
- 50%
- 10-21
- 80%
- 10-29
- 90%
- 11-01
Growing season length (days, 28°F threshold)
- Short year
- 155
- Median
- 189
- Long year
- 213
Source NOAA station
COLUMBUS JUNCTION, IA US
6.6 mi · 30 yrs of record (1991–2020) · 590 ft elev.
Data from COLUMBUS JUNCTION, IA US, 6.6 miles away with 30-year NOAA record (1991-2020).
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